What is Blockchain?

What is Blockchain?

A blockchain is a digital record book that is shared across thousands of computers at the same time. Think of it like a public register at your local municipality office, except no single person or government controls it, and once something is written in it, it cannot be erased or changed.

How Does a Blockchain Work?

Every time someone sends cryptocurrency - for example, you send Bitcoin from your CoinDCX wallet to a friend - that transaction is bundled together with other recent transactions into a "block". This block is then added to the end of a long chain of previous blocks. That chain is the blockchain.

• Each block contains a list of transactions, a timestamp, and a unique code called a "hash".
• The hash of every block also includes the hash of the block before it, linking them together like chain links.
• This makes it nearly impossible to change old records without breaking every block that came after it.

Why Does Blockchain Matter for Indian Investors?

India has a long history of trust issues with centralized record-keeping - land records, financial fraud, and middlemen taking cuts. Blockchain solves many of these problems by making records transparent and tamper-proof. For example, blockchain-based land registries are already being piloted in states like Andhra Pradesh and Telangana.

In crypto, the blockchain is what lets you verify that 1 Bitcoin really was sent from one wallet to another, without needing a bank or intermediary to confirm it.

Key Points to Remember

• Blockchain is the underlying technology behind Bitcoin, Ethereum, and most cryptocurrencies.
• It is decentralized - no single company or government controls it.
• Records are permanent and visible to anyone.
• You can explore any transaction on a "block explorer" like etherscan.io for free.